A series is defined as each time a team receives a new set of downs. The offense succeeds on a series if they get enough yards for a new first down, the defense commits a penalty resulting in a first down, or they score a touchdown. The offense fails on a series by punting, attempting a field goal, or turning the ball over (including a turnover on downs). Note that a series is different than a drive, as most drives contain more than one series.
The data used comes from nflscrapR and covers the 2009-2018 NFL seasons. For simplicity, series that either contained a penalty or ended the half or overtime without a clear success or failure have been excluded.
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